Sri Lanka decision proposal
Tell us what to change or add.
Archived decisions
Open a decision below. Check the area, period, inputs, result and proposed next step.
Use Change example to try different values. Use Data needed to check the fields and sources. The land-use change decision has its own comparison views.
Record your corrections below, then download your answers or print them.
Compare crop-water requirements with the records supporting a seasonal system plan.
Verified published component · Crop evapotranspiration ETc component
Fictional default example · 2025.
What the selected record shows. Gross daily irrigation requirement: 6,687.5 m³/day.
Next step. Review weather, crop, water-availability and operating evidence. Prepare water-needs scenario in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
Calculated crop need is not an approved cropping or release plan.
ETc = ETo × Kc. Net = max(0, ETc + percolation + desired storage increase − rainfall after runoff − capillary contribution). Gross = net × hectares ×10 / application efficiency.
The full local balance, rooting depth, stress, crop stage and operating constraints still matter. The paddy allowance is explicit and must be zero where inapplicable. This is not an authorized reservoir release.
Other required records: System; crop hectares; crop coefficients; rainfall; soil storage; efficiency.
Food and Agriculture Organization of the United Nations · FAO Irrigation and Drainage Paper 56 Crop EvapotranspirationInstitution publication · Chapter 5, Crop coefficient approach, equation 56
This verifies the ETc component only. Local water-balance allowances, coefficients and operating decisions still need confirmation.
Calculation appendix
Compare system delivery targets and measured water supplied in the same period.
Validation required
What the selected record shows. Difference: -16,000 m³.
Next step. Check the matching records and reasons for the difference. Prepare difference review in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
A volume shortfall does not establish its cause or authorise a new allocation.
Observed value minus Planned value. Relative change = 100 × difference / Planned value when the earlier value is positive.
Other required records: System ID; approved allocation; actual delivery; season; command hectares.
Reconcile storage and transfer records within a defined control volume.
What the selected record shows. Calculated closing storage are 164,000 m³. The recorded closing observation is 163,500 m³; recorded minus calculated is -500 m³. Check the component records before explaining that difference.
Next step. Reconcile closing balance. Prepare balance review in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
Internal transfers must not be counted as both new system inflow and outflow.
Calculated closing = opening + inflows − releases/transfers − other outflows. Residual = independently observed closing − calculated closing.
Use the same physical boundary, period and units. A residual is a reconciliation issue, not automatically a measured loss. For a combined reservoir boundary, eliminate transfers wholly inside that boundary. The example is a single stated control volume, not the total Mahaweli system.
Other required records: Reservoir storage; inter-basin transfers; inflow; releases; evaporation; spill.
Identify stale or missing observations used in seasonal planning.
What the selected record shows. Completeness: 80 %. Check overdue observation.
Next step. Check overdue observation. Prepare observation request in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
Old observations cannot stand in for current system conditions.
Completeness = 100 × valid / expected. Age = assessment date − latest valid observation; compare with the explicitly supplied interval.
A recent observation does not fill earlier gaps. Unknown schedule or observation time cannot establish freshness.
Other required records: Source ID; expected cadence; last valid reading; completeness; calibration.
Compare proposed sector allocations using dependable water, energy and demand evidence.
What the selected record shows. There is not enough information to choose this option. Obtain the records and evidence about conditions listed below. The supplied budget less cost is 300,000 LKR.
Next step. Obtain the missing records before choosing. Prepare evidence request in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
Cost and descriptive benefits alone cannot determine an allocation.
Compare each alternative's stated benefit, adverse effects, domain evidence and mandatory constraints. Where cost and budget are supplied, budget balance = budget − option cost. A budget balance alone does not determine domain feasibility or select an option.
Other required records: Sector demand; storage; conveyance capacity; environmental requirements; allocation authority.
Check the shortage, affected demands and operating evidence for demand-management review.
What the selected record shows. The required evidence is incomplete for this drought response case. The items below identify what must be obtained or reconciled.
Next step. Obtain the missing evidence listed below. Prepare evidence request in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
A checklist does not estimate shortage probability or select a response.
Check each required item and retain its reference. A documented item is not a scientific, legal or institutional approval.
Show the hazard, exposure and verified controls separately. No generic score, probability, diagnosis, site clearance or official warning is derived from a count.
Other required records: System shortages; crop stages; essential demand; feasible options; impacts.
Check land-request and rights evidence before a Mahaweli land referral.
What the selected record shows. The required evidence is incomplete for this land allocation case. The items below identify what must be obtained or reconciled.
Complete paperwork does not grant agricultural or commercial use permission.
Evidence completeness alone cannot establish suitability, eligibility, safety, permission or method validity.
Other required records: Parcel ID; applicant evidence; permitted purpose; plan edition; current rules.
Review the supplied proposal areas, applicable plan, conditions and rights before preparing a case referral.
Fictional example records. Geographic context is separate from an exact site and the applicable Mahaweli system. Supplied hectares are not measured from the reference image.
What the first case shows. 10 ha proposed: 4 ha match the example plan, 3 ha have conditions, 2 ha have a reported conflict (20.0%), and 1 ha remain unmatched. No land-use permission is granted. Still needed: Exact site or asset reference; Applicable system jurisdiction and source for the responsible system office; Plan matches for the unmatched area; Affected tenure and rights evidence. The figures describe the supplied example records; they do not settle these gaps.
Next step. Obtain the exact site and applicable system-office evidence. Use the prototype to prepare a visible evidence request or case-review draft; it remains unassigned and is not sent.
Compatible + conditional + reported conflict + unresolved area must equal total proposal area. Reported conflict share = 100 × conflict area / total proposal area. These are supplied area records, not a map calculation.
A percentage cannot establish plan compatibility or permission. Unresolved plan matches and conditions remain visible. The reference image is geographic context, not the source of these areas.
Required evidence: Exact site or asset reference; Applicable system jurisdiction and responsible system-office source; Proposal use and area; Applicable system plan and rules edition; Matching source survey and area definitions; Non-overlapping plan-match areas; Conditions and affected tenure.
Review the reported reservation overlap, inspection, permission and maintenance access before preparing a case referral.
What the first case shows. 0.15 ha of the 0.6 ha observed activity is reported inside the reservation (25.0%). A matching permission is missing or disputed. This does not establish unlawful occupation. Still needed: Exact site or asset reference; Applicable system jurisdiction and source for the responsible system office; Matching permission record and conditions; Inspection evidence about maintenance access. The figures describe the supplied example records; they do not settle these gaps.
Reported overlap share = 100 × reported activity overlap / total observed activity area. Count common overlapping parts once in the supplied survey record. No map intersection is performed.
A reported overlap is not a finding of unlawful occupation. Confirm the applicable survey, reservation basis, permissions and inspection evidence. No fixed reservation width, eviction, penalty or safety determination is inferred.
Required evidence: Exact site or asset reference; Applicable system jurisdiction and responsible system-office source; Reservoir or canal case identity; Applicable reservation survey and basis; Observed activity and inspection date; Activity area and reported overlap; Permission reference and maintenance access evidence.
Identify eligible households with no confirmed livelihood support or unknown follow-up.
What the selected record shows. 30 households are known to be uncovered; 5 have unknown coverage. 65% are confirmed covered.
Next step. Check the records behind the uncovered and unknown groups. Prepare coverage follow-up in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
Coverage does not establish entitlement or the best form of support.
100 × distinct covered eligible units / eligible frame. Known uncovered = frame − covered − unknown.
Count each eligible unit once for the selected service and period. Received messages, attendance, adoption and outcomes are separate measures.
Other required records: Settler ID; assessed need; services received; eligibility frame; system.
Compare matching agricultural output and water volume by system.
What the selected record shows. Saleable crop output: 19,780 kg; Matching irrigation water input: 7,200 m³. This gives 2.747 kg/m³.
Next step. Check matching outputs, denominators and operating conditions. Prepare performance comparison in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
Productivity ratios do not establish the cause of a difference.
Saleable crop output / Matching irrigation water input, for the same product, process and period.
Other required records: Harvest kg; delivered cubic metres; cropped hectares; season; crop type.
Compare cropping-pattern choices using crop area, water demand, livelihoods and constraints.
A budget comparison does not establish an agronomically feasible plan.
Other required records: Crop margins; seasonal water; labour; markets; soil suitability; constraints.
Identify overdue maintenance cases and inspect their engineering evidence.
What the selected record shows. Open days past due: 29 days. Follow up overdue case.
Next step. Follow up overdue case; confirm the missing condition evidence. Prepare evidence request in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
Case age alone is not engineering severity or repair priority.
Open age = assessment date − received date. Days past due = max(0, assessment date − recorded due date) for open cases. Show documented critical conditions separately.
Example due dates are not legal service standards. Do not alter statutory deadlines by silently subtracting pauses, or infer severity from age alone.
Other required records: Asset ID; condition; defects; criticality; inspection date; repair estimates.
Compare settlement-service demand with usable service capacity.
What the selected record shows. Usable capacity minus demand: -15 m³/day. Review capacity shortfall.
Next step. Review capacity shortfall. Prepare capacity review in the prototype creates a visible, downloadable draft. It is unassigned and not sent.
A capacity gap does not select or authorise an infrastructure expansion.
Usable capacity = rated capacity − documented unavailable capacity. Surplus/shortfall = usable − matching demand.
Match peak/average basis, time window, skill, staffing, accessibility and other binding constraints. One aggregate capacity does not override a safety constraint.
Other required records: Household demand; water and road capacity; service locations; projected occupancy.
Compare restoration choices using catchment, riparian, rights and resource evidence.
Predicted benefits remain assumptions until supported by local evidence.
Other required records: Site condition; land rights; restoration costs; biodiversity; watershed benefit evidence.
Identify unresolved reservoir-use issues involving fisheries and other users.
What the selected record shows. 16 unresolved issue(s). 71.579% responded; response is not consent. Review the issue references and participation barriers.
Response counts do not establish consent or resolve use rights.
100 × distinct respondents / invited people. Record unresolved issues individually; one respondent may raise several issues.
Response, attendance and silence are not consent. Participation does not transfer decision authority or settle rights.
Other required records: Use proposals; water-operation calendar; fisheries needs; consultations; conditions.
Check inflow evidence, operating limits and coordination prerequisites.
What the selected record shows. The required evidence is incomplete for this flood operations case. The items below identify what must be obtained or reconciled.
The page neither forecasts a flood nor operates a reservoir.
Other required records: Official forecasts; reservoir levels; downstream exposure; approved operating rules.
Compare planned and recorded system-development milestone dates.
What the selected record shows. Calendar date difference: 8 days.
Delay alone does not establish cause, liability or an escalation level.
Observed date minus planned date in calendar days. Missing actual dates are pending, not zero delay. Approved working-day rules require a defined calendar.
Other required records: Project milestones; actual progress; contracts; budget; dependencies; verification.
Identify unresolved objections to a system-development proposal.
Participation figures do not establish agreement.
Other required records: Proposal version; affected users; responses; unresolved concerns; approval conditions.
Find land and water-system codes whose definitions or source references need reconciliation.
What the selected record shows. The required evidence is incomplete for this system reporting case. The items below identify what must be obtained or reconciled.
A completed mapping checklist does not authorise overwriting the source codes.
Other required records: Source system labels; official system registry; geometry edition; steward decisions.
Source. Sri Lanka publication.
Data needed. System and block, season, expected net harvested hectares and a comparable yield estimate.
Method. Apply the DCS paddy production relationship to each matched block and season. Compare revised estimates with the approved planning figures.
Worked example. A Mahaweli block expects 65 ha to be harvested at 4.2 t/ha. The estimate is 273 t, which is 17 t below its 290 t plan. Ask the block officer what changed.
Next step. Ask the block officer to investigate a material difference in harvested area or expected yield.
Department of Census and Statistics, Paddy Statistics Yala 2023. Introduction and Mahaweli block-level area, yield and production tables.
Confirm comparable seasons, net area, yield source and the review threshold.
Check which existing source fields can supply the decision inputs.
Existing form reference: 648a6f28a711dfa9
Existing form reference: ce5ed1b99bb3102f
Existing form reference: 8d60801843516765
Existing form reference: ba56f4a118b8defb
Existing form reference: f173e69599dc5331
Existing form reference: aab19eb1fe26e99f
Existing form reference: f0192290b75919c0
Existing form reference: ccd11935ddd740eb
Existing form reference: 8123426118305c93
Existing form reference: 46072ad6caa5f83d
Existing form reference: 66361481a1066277
Existing form reference: f38ab955cf2f6bd4
Existing form reference: 1bb76fa1770b0049
Existing form reference: d15540e8ecb12c69
Existing form reference: 0f0d24cef4bd6481
Existing form reference: dd591850f1e639e2
Existing form reference: 70efb0310e727bec
Existing form reference: a23c11282c20ec1d
Existing form reference: 7caa76b009c9aa66
Existing form reference: d89ee67747f1e131
Existing form reference: a928ea0c164539db
Existing form reference: 8e71c080613ac3a4
Existing form reference: 1b6608ff1b096b55
Existing form reference: b2dbe12695570d5c
Your institution has its own document and image library. Use the same library for reports, photos and other evidence.
Open this screen for Mahaweli Authority of Sri LankaSee the presentation example
Files added in the prototype stay in this browser. Public sharing is an access preview. Existing public reference links already work online.
Data structure keeps the existing source tree, records, charts and map. Manage structure adds a place to propose changes to definitions.
An entity type means a kind of thing or event, such as a reservoir or an inspection. Drafts stay in this browser. A demo approval does not change real definitions, data, chart links or sharing rights.
User management shows example profiles for each institution. People and Roles and access let you review the proposed account screens.
These are interface previews only. They create no account, send no email and change no access. Use example details in the preview. Institution verification does not grant a real permission.
We currently use public data and published reports where available. Please confirm whether your institution can provide data directly, so we can avoid retyping or reading figures from PDFs.
Do not enter passwords, access keys or private account details.
Use the Download answers button at the top of this page. Share the downloaded file or printed copy through your agreed review channel. Nothing is sent automatically.